Name: 葉に私のための時間。ツリークロロフィルクロマトグラフィー (Time for Me to Leaf: Tree Chlorophyll Chromatography)
Uploaded: 2021-01-14T05:45:45.000Z
Duration: 8 min 45 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

It's fall in New England, the time of year

when all the leaves change from green to red, yellow,

But did you ever wonder why that transition happens?

gives leaves their characteristic green color.

I'm on a mission to find out why every year in the fall

the leaves change from this beautiful green shade

how to find out exactly why all of those color changes happen.

But first, we need to talk about something

Photosynthesis is the process that plants

To conduct photosynthesis, plants need three things.

Third, and perhaps most important, plants need energy.

Plants absorb sunlight through their leaves,

is what gives plants its green appearance.

With those three things things- water, carbon dioxide,

and sunlight, plants conduct photosynthesis,

is glucose, which is a sugar that plants need to stay alive.

A byproduct of photosynthesis, in addition to glucose,

So really, if you look at it, chlorophyll

is a critical piece to the photosynthesis puzzle

to produce food that they need and to produce oxygen

There are two other pigments that are in every leaf.

There's an orange-red pigment called carotene

During the summer, when there's more light,

trees will produce more of you so that the leaves will appear

green, but there is still carotene and xanthophyll

So you're saying that even a green leaf has

all these other pigments in it, but they still

look green because there's so much chlorophyll.

Right now, even inside of you, there's all three pigments.

Well, if you don't believe me, I'll take you to a laboratory,

We're going to do the chromatography experiment.

So chromatography is a process that you can use

proved that there are multiple pigments in every leaf.

So we're going to recreate his famous experiment here,

using materials that you can find around your house.

are a pair of scissors, a ruler, three pencils, some scotch

in the experiment, a whole bunch of leaves

of all the different colors, and filter paper.

Here, we're just using basic coffee filters.

one glass for each person that's in the experiment.